Subglottal pressure oscillations in anechoic and resonant conditions and their influence on excised larynx phonations.
Subglottal pressure oscillations in anechoic and resonant conditions and their influence on excised larynx phonations.
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DOI：
10.1038/s41598-020-79265-3
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发表时间：
2021-01-08
影响因子：
4.6
通讯作者：
Švec JG
中科院分区：
文献类型：
--
作者：
Lehoux S;Hampala V;Švec JG
切除的喉作为研究声源行为的自然模型。喉部下方的空气供应管内的声学共振（即，声门下空间）与喉的振动行为相互作用，并且模糊了它们固有的振动特性。在这里，我们探索一种新设计的消声声门下空间，允许消除其声共振。我们进行了切除喉实验，同时使用消声和共振声门下空间，以分析和比较，第一次，相应的声门下压力，电声门图和辐射声波波形。与共振条件相反，消声声门下压力波形在声带接触阶段显示出可忽略的振荡，正如预期的那样。当被反转时，这些波形紧密地匹配逆滤波的辐射声波形。声门下共振也改变了辐射声压（1级相互作用）。此外，他们还改变了声带振动的基本频率（fo）并抵消了发声阈值压力（2级相互作用），即使声门下共振频率比fo高4-10倍。所获得的数据提供了基础，更好地了解固有的振动特性的声带，研究结构声学相互作用对语音的影响，并验证语音生产的计算模型。
Excised larynges serve as natural models for studying behavior of the voice source. Acoustic resonances inside the air-supplying tubes below the larynx (i.e., subglottal space), however, interact with the vibratory behavior of the larynges and obscure their inherent vibration properties. Here, we explore a newly designed anechoic subglottal space which allows removing its acoustic resonances. We performed excised larynx experiments using both anechoic and resonant subglottal spaces in order to analyze and compare, for the very first time, the corresponding subglottal pressures, electroglottographic and radiated acoustic waveforms. In contrast to the resonant conditions, the anechoic subglottal pressure waveforms showed negligible oscillations during the vocal fold contact phase, as expected. When inverted, these waveforms closely matched the inverse filtered radiated sound waveforms. Subglottal resonances modified also the radiated sound pressures (Level 1 interactions). Furthermore, they changed the fundamental frequency (fo) of the vocal fold oscillations and offset phonation threshold pressures (Level 2 interactions), even for subglottal resonance frequencies 4–10 times higher than fo. The obtained data offer the basis for better understanding the inherent vibratory properties of the vocal folds, for studying the impact of structure-acoustic interactions on voice, and for validation of computational models of voice production.
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影响因子：
2.4
作者：
CRANEN, B;BOVES, L
通讯作者：
BOVES, L
影响因子：
--
作者：
Herbst, Christian T.
通讯作者：
Herbst, Christian T.
影响因子：
4.7
作者：
Lucero, JC
通讯作者：
Lucero, JC
影响因子：
2.9
作者：
HERZEL, H;BERRY, D;STEINECKE, I
通讯作者：
STEINECKE, I
影响因子：
2.2
作者：
Berry, DA;Herzel, H;Story, BH
通讯作者：
Story, BH